Butler was originally born as a conversational bot that reacted to commands entered as cards on your boards. While the Power-Up offers supreme convenience and integration, you can also interact with Butler using the Bot interface.
The bot performs actions as a separate user (@butlerbot). This makes it easier to differentiate the automated actions, but can lead to an increase of Trello notifications. Additionally, the bot needs to be invited to every board (does not apply to Enterprise Butler).
The Bot interface has a richer palette of actions and triggers than the Power-Up. It also features programming constructs such as conditionals and "for each" loops. But it is harder to use and more intrusive on your boards. We recommend most users get started with the Power-Up and move to the bot only if they require it.
Commands on the Board
Butler commands are entered directly as cards on the board, or separately as global commands in the dashboard interface.
Throught the years, a vibrant community of users has gathered around the Butler Bot public Trello board, offering videos, commands and even complete board automation examples. You can also find all the documentation about the bot interface there.